MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


GuLoader


Vendor detections: 17


Intelligence 17 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539
SHA3-384 hash: e716709ab72a17db949f7cf7392d1d3d832d22b1db1063b2a677300ac5adee6b9bfc607e7f7a620551a61a2fb8759b40
SHA1 hash: 99691524e4523ed7b93ade43e073bc6b591647f3
MD5 hash: 60580e227b72528a2272baaa708e7e05
humanhash: lamp-wisconsin-hydrogen-london
File name:12411225.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:573'336 bytes
First seen:2025-11-12 14:57:03 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 46ce5c12b293febbeb513b196aa7f843 (35 x GuLoader, 21 x RemcosRAT, 5 x VIPKeylogger)
ssdeep 12288:DX4j6f40DcylpOb/n/+DGfOUznAzPnSgMhGcDkagLRvzOOat:L4oD3lcT/+DuOUDAz3WDkLzAt
Threatray 2'257 similar samples on MalwareBazaar
TLSH T128C402303654F059C80FA13C4B1EF22E57B9F8E92B07855B6B61BF6E3DB5283890A4D4
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 3068d0d8cce46431 (3 x RemcosRAT, 2 x GuLoader)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Hjtaleranlggenes
Issuer:Hjtaleranlggenes
Algorithm:sha256WithRSAEncryption
Valid from:2025-10-26T10:24:13Z
Valid to:2026-10-26T10:24:13Z
Serial number: 6a4c5aa6527f7c5463f3b048551a255653199cbd
Thumbprint Algorithm:SHA256
Thumbprint: 038f4c741d0ae5507469ff22fe14f93c64cba033411ca8400b026d49c4d1b8bd
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
147
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
BL-SSE0006271.arj
Verdict:
Malicious activity
Analysis date:
2025-11-12 09:55:16 UTC
Tags:
arch-exec remcos rat remote stealer mpress
Link:
https://app.any.run/tasks/18158098-a610-4ba1-ab10-d32642b63b22

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/37725/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6914a05328ddbbca4d8d6726
Tags:
injection obfusc
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Gathering data
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-12T01:57:00Z UTC
Last seen:
2025-11-14T10:25:00Z UTC
Hits:
~1000
Detections:
Trojan-Downloader.Win32.Minix.cco Trojan.Win32.GuLoader.sb Trojan-Dropper.Win32.Injector.sb PDM:Trojan.Win32.Generic Trojan-Downloader.Win32.Minix.sb Trojan.NSIS.Makoob.sba HEUR:Trojan.NSIS.GuLoader.gen Backdoor.Win32.Remcos.sb
Link:
https://opentip.kaspersky.com/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539/results?tab=lookup
Malware family:
WinEdt Team
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9af85954-4c8c-4a02-91d1-3a096f75838e
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad.phis.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1812714
Signature
AI detected suspicious PE digital signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found direct / indirect Syscall (likely to bypass EDR)
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1812714 Sample: 12411225.exe Startdate: 12/11/2025 Architecture: WINDOWS Score: 100 67 drive.usercontent.google.com 2->67 69 drive.google.com 2->69 75 Suricata IDS alerts for network traffic 2->75 77 Found malware configuration 2->77 79 Antivirus detection for dropped file 2->79 81 9 other signatures 2->81 10 12411225.exe 57 2->10         started        14 remcos.exe 2->14         started        16 remcos.exe 34 2->16         started        18 rundll32.exe 2->18         started        signatures3 process4 file5 57 C:\Users\user\AppData\Local\...\System.dll, PE32 10->57 dropped 103 Tries to detect virtualization through RDTSC time measurements 10->103 105 Unusual module load detection (module proxying) 10->105 107 Switches to a custom stack to bypass stack traces 10->107 20 12411225.exe 2 10 10->20         started        59 C:\Users\user\AppData\Local\...\System.dll, PE32 14->59 dropped 109 Found direct / indirect Syscall (likely to bypass EDR) 14->109 25 remcos.exe 14->25         started        61 C:\Users\user\AppData\Local\...\System.dll, PE32 16->61 dropped 27 remcos.exe 16->27         started        signatures6 process7 dnsIp8 71 drive.google.com 142.250.81.238, 443, 49711, 49713 GOOGLEUS United States 20->71 73 drive.usercontent.google.com 142.251.40.225, 443, 49712, 49714 GOOGLEUS United States 20->73 53 C:\ProgramData\Remcos\remcos.exe, PE32 20->53 dropped 55 C:\ProgramData\...\remcos.exe:Zone.Identifier, ASCII 20->55 dropped 89 Detected Remcos RAT 20->89 91 Creates autostart registry keys with suspicious names 20->91 29 remcos.exe 34 20->29         started        93 Found direct / indirect Syscall (likely to bypass EDR) 25->93 file9 signatures10 process11 file12 63 C:\Users\user\AppData\Local\...\System.dll, PE32 29->63 dropped 111 Multi AV Scanner detection for dropped file 29->111 113 Found hidden mapped module (file has been removed from disk) 29->113 115 Tries to detect virtualization through RDTSC time measurements 29->115 117 3 other signatures 29->117 33 remcos.exe 4 10 29->33         started        signatures13 process14 dnsIp15 65 140.228.29.202, 2404, 49720, 49721 OARNET-ASUS United States 33->65 47 C:\Users\user\AppData\Local\Temp\TH7B79.tmp, MS-DOS 33->47 dropped 49 C:\Users\user\AppData\Local\Temp\TH7B59.tmp, MS-DOS 33->49 dropped 51 C:\Users\user\AppData\Local\Temp\TH7AFA.tmp, PE32 33->51 dropped 83 Detected Remcos RAT 33->83 85 Writes to foreign memory regions 33->85 87 Maps a DLL or memory area into another process 33->87 38 RmClient.exe 33->38         started        41 RmClient.exe 33->41         started        43 RmClient.exe 33->43         started        45 RmClient.exe 33->45         started        file16 signatures17 process18 signatures19 95 Tries to steal Instant Messenger accounts or passwords 38->95 97 Tries to steal Mail credentials (via file / registry access) 38->97 99 Tries to harvest and steal browser information (history, passwords, etc) 41->99 101 Unusual module load detection (module proxying) 43->101
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/60580e227b72528a2272baaa708e7e05
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-11-12 06:48:14 UTC
File Type:
PE (Exe)
Extracted files:
20
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w55eocv4vuvm3xpma5byqe4yr3jp2up4iik2whulqa6h347zau4q._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
012f35c08771f1dd0f3bb047290aa4aaa65c2c50bc33f4f228be1eee2fbec08c
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07ac845eee39222cc487d6dfe0a50f12874af6b05ea0390b5d6e4e4e64d3e18c
GuLoader
177cfa885f0765b9f144317458a981980d76e123ecc2db7f5b93168bcc8a50a9
GuLoader
2063a60fbca68f7ad52718a38951a3ddb21806d98b7f72256a47534700fd861d
GuLoader
39396ab96a8f83c225badbc07835d28f29e38fe06b9168e71be5a475176d66b2
GuLoader
777f01bcb30b95100b1a4ea16d0dd4f52f8d8f5fb89141347f3001fac0401f8e
GuLoader
7aaf10f8c4045112787c3e8012f6ab8d5fe11ddf9c089b36e453db92e6d0a0e1
GuLoader
9a75a37b7bce57d0936384da613c9623e7d311c7550d9ffb14d723c9b118ae45
GuLoader
b4974c7f703bc826a655d542c19dcf0e61c9e8c64b2ff7a2f981fdae8adac615
GuLoader
error
GuLoader
+ 2'247 additional samples on MalwareBazaar
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/02ae900a-5cdb-4fd7-955d-faf54297d8f2
Unpacked files
SH256 hash:
b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539
MD5 hash:
60580e227b72528a2272baaa708e7e05
SHA1 hash:
99691524e4523ed7b93ade43e073bc6b591647f3
Link:
https://www.unpac.me/results/d3a3d1a4-df55-460e-9737-ae9803234e42/
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
Link:
https://www.unpac.me/results/d3a3d1a4-df55-460e-9737-ae9803234e42/
SH256 hash:
b1350f487692057c8ffde75dcc55287a52a3272240d4d4912f24464b27551fc0
MD5 hash:
8f0e7415f33843431df308bb8e06af81
SHA1 hash:
1314272e6ad3be1985d4a1607b890a34b0bde8b5
Link:
https://www.unpac.me/results/d3a3d1a4-df55-460e-9737-ae9803234e42/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b77a470abcad/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

GuLoader

Executable exe b77a470abcad2acdddec07438813988ed2fd51fc4215ab1e8b803c7df3f90539

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/37725/

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